Here's a side-by-side comparison of the window lifts, before and after. The acid solution didn't damage the factory galvanized coating on the lift mechanism, either. If your lifts have more than light surface rust, however, you'll need to bead blast them. This process doesn't seem to hurt any plastic parts on the lifts, either. The restored piece actually looked a little worse than the unrestored example before Mike started.The action of the restored window lift is flawless, which makes cranking the windows up and down almost effortless, so there's one less thing to detract from your driving enjoyment. You won't even notice that all the restored components work perfectly, but that's the point, isn't it?